IMPORTANT

Flux Kontext Prompt Techniques

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1. Basic Modifications

• Simple and direct: "Change the car color to red"

• Maintain style: "Change to daytime while maintaining the same style of the painting"

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2. Style Transfer

Principles:

• Clearly name style: "Transform to Bauhaus art style"

• Describe characteristics: "Transform to oil painting with visible brushstrokes, thick paint texture"

• Preserve composition: "Change to Bauhaus style while maintaining the original composition"

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3. Character Consistency

Framework:

• Specific description: "The woman with short black hair" instead of “she”

• Preserve features: "while maintaining the same facial features, hairstyle, and expression"

• Step-by-step modifications: Change background first, then actions

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4. Text Editing

• Use quotes: "Replace 'joy' with 'BFL'"

• Maintain format: "Replace text while maintaining the same font style"

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Common Problem Solutions

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Character Changes Too Much

❌ Wrong: "Transform the person into a Viking"

✅ Correct: "Change the clothes to be a viking warrior while preserving facial features"

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Composition Position Changes

❌ Wrong: "Put him on a beach"

✅ Correct: "Change the background to a beach while keeping the person in the exact same position, scale, and pose"

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Style Application Inaccuracy

❌ Wrong: "Make it a sketch"

✅ Correct: "Convert to pencil sketch with natural graphite lines, cross-hatching, and visible paper texture"

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Core Principles

1. Be Specific and Clear - Use precise descriptions, avoid vague terms

2. Step-by-step Editing - Break complex modifications into multiple simple steps

3. Explicit Preservation - State what should remain unchanged

4. Verb Selection - Use “change”, “replace” rather than “transform”

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Best Practice Templates :

Object Modification: "Change [object] to [new state], keep [content to preserve] unchanged"

Style Transfer: "Transform to [specific style], while maintaining [composition/character/other] unchanged"

Background Replacement: "Change the background to [new background], keep the subject in the exact same position and pose"

Text Editing: "Replace '[original text]' with '[new text]', maintain the same font style"

Remember: The more specific, the better. Kontext excels at understanding detailed instructions and maintaining consistency.

source :

https://docs.comfy.org/tutorials/flux/flux-1-kontext-dev